I've a few questions:

 - Does 'zpool iostat' report numbers from the top of the ZFS stack or at the 
bottom? I've corelated the zpool iostat numbers with the system iostat numbers 
and they matchup. This tells me the numbers are from the 'bottom' of the ZFS 
stack, right? Having said that it'd be nice to have zpool iostat return numbers 
at the top of the stack. This becomes relevant when we've compression =ON.

  - Secondly, I did some more tests and I find the same read waves and the 
consistent write throughput. I've been reading another thread on this forum 
about Niagara and the compression where Matt Ahrens noted that the compression 
at this time is single-threaded. Further, he stated that there maybe a bugfix 
released to use multiple threads. I eagerly await the fix.

Thanks again for a great feature. Looking forward to more fun stuff out of Sun 
and you Mr. Bonwick.
 
 
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